The new wave of wearable fitness gadgets can tell you more data about your workout than has ever been available. Best of all, these gadgets are affordable and easy to use.

Fitbit Flex

Fitbit Flex

Price: $99

The Fitbit Flex is a great way to get on the road to more movement. It's a small, unobtrusive band designed to be worn on the wrist that comes in a variety of colors and sizes. Essentially, the Fitbit Flex is a pedometer that tracks the number of steps you take and how that activity stacks up to specific goals you set in advance. Wear the waterproof Fitbit all day and all night (you'll need to charge it about once a week), and it tracks how much you move and even how well you sleep. Tap the device when you're going to sleep and after you wake up to track the hours; it judges the quality of your sleep based on your movements.

Everyday tasks, such as mowing the lawn or running to catch the bus, count toward your daily goal. The Flex syncs wirelessly to a computer or smartphone.

Jawbone UP

Jawbone UP

Price: $129.99

Like the Fitbit, the Jawbone UP is a small wristband that tracks movement via a built-in accelerometer. The Jawbone UP app tracks movement and resting patterns as well as food intake. The UP also features a timer to provide an overall picture of how many calories you've burned.

Unlike the Fitbit Flex, Jawbone's UP can't sync wirelessly—you have to plug it into your iOS or Android device to download its data. However, where the Flex is relatively stiff, the UP has a flexible, wrap-on design.